diff --git a/Net/include/Poco/Net/TCPServerDispatcher.h b/Net/include/Poco/Net/TCPServerDispatcher.h
index 920a07576..a87d32a2d 100644
--- a/Net/include/Poco/Net/TCPServerDispatcher.h
+++ b/Net/include/Poco/Net/TCPServerDispatcher.h
@@ -26,6 +26,7 @@
 #include "Poco/NotificationQueue.h"
 #include "Poco/ThreadPool.h"
 #include "Poco/Mutex.h"
+#include <atomic>
 
 
 namespace Poco {